I switched to Firefox from Chrome about 12 months ago. It isn't as good as Chrome, but I was trying to reduce my Google dependencies. It has been mostly fine (except for an annoying OS-X multi-screen bug where it screws up the sizing). I was really looking forward to this feature to help close the gap on Chrome performance. Until August (I think Firefox 48.x), when it became unusable on any site with... something. I'…
I've found Firefox performance to be absolutely awful at work on OS X. I have no issues at all with it at home on Linux, and didn't have any issues in my previous job on OS X either. I'm not sure if it's OS X specific, a change in recent versions, this laptop being underpowered, or the nature of the work I do (a lot of video stuff), but anything JS heavy severely slows down or locks up the browser. And if anything, i…
All this takes maybe five minutes on Linux, on Mac OS X it will freeze the OS for long periods of time and take 40 minutes to run. In terms of hardware, the Linux box has less RAM, CPU and slower discs.
Regarding the Javascript stuff: Part of it may be that Chrome is the new Internet Explorer. People develop on and test for Chrome (because everyone uses Chrome, right?). Chrome does have the better Javascript engine, still, I believe that much of the slow Javascript on Firefox (an other browsers) could be avoided if people bothered testing a little more.